134 results about "Protein fiber" patented technology

The invention provides a soybean amyloid protein fiber, a preparation method thereof, a high internal phase emulsion and application, and belongs to the technical field of protein fibers. The preparation method comprises the following steps: dissolving soybean protein isolate in water, adjusting the obtained soybean protein isolate solution to a first pH value, carrying out ultrasonic treatment and / or first stirring treatment, adjusting the obtained feed liquid to a second pH value, sequentially carrying out second stirring treatment, dialysis and freeze drying, and dissolving the obtained pretreated soybean protein isolate in water, adjusting the pH value of the pretreated soybean protein isolate solution to a third pH value, and sequentially performing hydration treatment and fiber growth treatment to obtain the soybean amyloid protein fiber. The invention provides a soybean amyloid protein fiber preparation method based on ultrasonic pretreatment and / or pH migration pretreatment. The yield and the emulsifying property of the obtained soybean amyloid protein fiber can be remarkably improved.

A method of preparing a polyamide membrane with multi-level pore structure mediated by protein fiber network includes the steps of: preparing protein fiber; quenching and carrying out dialysis; loading protein fiber network on ultrafiltration membrane; preparing aqueous and organic phase solutions; and carrying out interfacial polymerization, which can solve the problems of the integrity and separation performance of the polyamide layer being affected by low porosity of the base membrane and uneven distribution of amine monomers. The polyamide membrane prepared by the method of the present invention greatly improves the water flux while ensuring a high salt rejection rate. At the same time, the introduction of the protein fiber network also enhances the mechanical strength and anti-pollution ability of the membrane.

The invention discloses a woolen spinning production process for cashmere and protein fiber blended yarn. The woolen spinning production process comprises the steps of raw material selection, wherein cashmere fibers and protein fibers are selected; the raw material pretreatment comprises wool mixing treatment of cashmere fibers and pretreatment of protein fibers; the pretreatment agent is prepared from deionized water, a penetrating agent, an antistatic agent, a silicon-based softening agent, cocamidopropyl hydroxysulfobetaine and waterborne polyurethane; in the opening picking process, two times of cotton cleaning are adopted; a carding process: carding the mixed fiber cotton rolls by adopting a carding machine to prepare mixed fiber strips; and a spinning process: spinning by using a mule spinning device. According to the woolen spinning production process for the cashmere and protein fiber blended yarn, the problems of damage to protein fibers, uneven mixing and the like during cashmere and protein fiber blending can be solved through wool mixing treatment of the cashmere fibers and pretreatment of the protein proportion, the yarn quality and the production efficiency are improved, and the production cost is reduced.

The application relates to the technical field of fabrics, and discloses an anti-wrinkle comfortable composite fabric containing superfine denier polyester fibers and a preparation method thereof. Cotton fibers treated with alkali are immersed into modified slurry containing quaternary ammonium salt modified graphene to obtain modified cotton fibers, silk fibers and protein fibers are respectively spun into yarns, and inner-layer fabric is woven, superfine denier polyester fibers and modified cotton fibers are respectively spun into yarns, outer-layer fabric is woven, and then the inner-layer fabric and the outer-layer fabric are fixed by sewing with polylactic acid fiber filaments to obtain the anti-wrinkle comfortable composite fabric containing superfine denier polyester fibers. The composite fabric has excellent wear resistance, mechanical properties and antibacterial properties, and has the characteristics of high elasticity, has good anti-wrinkle ability, and is not prone to deformation. The woven inner-layer fabric is soft and comfortable, and can meet various demands of people for garment fabrics.

The invention discloses a protein fiber-iron phytic acid composite flocculant as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out hydrolysis reaction on protein powder under an alkaline condition, and then cross-linking through epichlorohydrin to obtain epoxy group functionalized protein fibers; reacting phytic acid with an Fe salt precursor to prepare an Fe-phytic acid complex; and reacting the epoxy group functionalized protein fiber with the Fe-phytic acid complex to obtain the composite flocculant. The composite flocculant is a nano composite material with a three-dimensional network structure and a high specific surface area, has excellent flocculating settling capacity and broad-spectrum bactericidal performance, and can synchronously realize stable sludge structure, pathogenic microorganism control and ecological toxicity reduction in a sewage treatment system; the method effectively replaces traditional agents with potential safety hazards such as aluminum salt, ferric salt and chlorine-containing bactericide, and shows good adaptability and engineering feasibility under the condition of coping with high organic load and complex microbial systems.

The application provides a plant amyloid protein fiber and a preparation method and a composite film and a composite coating film preservative thereof, and belongs to the technical field of protein fibers. Plant protein isolate is mixed with water, and after the pH value is adjusted to 1.5-2.5, solid-liquid separation is carried out, the obtained plant protein-containing liquid material is subjected to fiber growth treatment, and a plant amyloid protein fiber is obtained. According to the growth kinetics curve, the fiber growth treatment comprises sequentially performing first incubation treatment, ultrasonic treatment and second incubation treatment, the time of the first incubation treatment is 0 h-end of the logarithmic growth phase, and the first incubation treatment and the second incubation treatment are performed under non-ultrasonic conditions. When the time of the first incubation treatment is 0 h, the ultrasonic power density of the ultrasonic treatment is greater than or equal to 2.5 W / mL. The method is convenient for simultaneously regulating the growth process and morphology of the fiber, and can reduce the proportion of rigid fibers.

The invention relates to the technical field of cashmere blended fabric dyeing, and discloses a one-bath one-step dyeing device and process based on cashmere blended fabric, comprising a dye vat, a dye barrel arranged on one side of the dye vat, a circulating pump arranged on one side of the dye barrel, a heating device fixedly mounted above the circulating pump, and a nozzle fixedly mounted in the dye vat; according to the dyeing device, the motor is used for driving the cloth lifting roller to rotate, the magnetic beads are limited through the limiting rings of different sizes, when the pressure borne by the cloth lifting roller is in different ranges, the magnetic beads can be clamped in the different limiting rings, and when the downward sliding distance of the cloth lifting roller is larger, the magnetic beads can be clamped in the different limiting rings. If the fabric is heavier, the content of the brewed protein fibers in the raw materials is higher, the tensile property of the fabric is better, and the power of the motor is controlled to be increased by the corresponding induction plate, so that the fabric can smoothly move in the dye vat, the fabric is prevented from being stacked, and meanwhile, the fabric is not deformed or wrinkled.

The application relates to the technical field of fabrics, in particular to a fabric based on protein fiber combined with natural fiber and a preparation method thereof, which is prepared by wet core-sheath composite spinning of a down protein sheath layer and a natural cellulose core layer; the core layer is natural cellulose fiber, and the total mass of the functional fabric is 70-90%; the balance is the sheath layer formed by cross-linking and solidification of a down protein solution; and the sheath layer is loaded with nano titanium dioxide; the introduced natural cellulose core layer is the main skeleton component of the fabric, selects natural fibers such as bamboo pulp cellulose and cotton linter pulp, and provides basic mechanical support for the fabric. The abandoned down resource is used to prepare protein fiber, which is combined with natural cellulose fiber to construct a composite fiber with a functional sheath layer and a mechanical core layer. The technical scheme solves the problems of insufficient sun protection, insufficient antibacterial performance and single mechanical performance of traditional natural fiber fabrics.

The invention relates to the field of dye chemistry, and discloses an acid dye with high color fastness, a preparation method of the acid dye and application of the acid dye in textile dyeing. According to the dye molecule, a 4-sulfo benzene ring and a 2, 5-dichlorobenzene ring are connected through an azo bridge (-N = N-), and a polysulfonate substituent group (-SO3Na) is introduced to a molecular skeleton to form a symmetric azo conjugated structure. The preparation method comprises the steps of nitration, reduction, sulfonation, diazotization, coupling and the like, the process conditions are mild, and the yield is stable. The obtained dye has a strong absorption peak in the range of 540-560nm, and the molar absorption coefficient epsilon is greater than or equal to 1.0 * 10 < 5 > L.mol <-1 >. Cm <-1 >. Compared with the conventional acid red dye, the dye has the advantages that the light fastness can reach grade 8, the fastness to washing is grade 7 or above, the color is bright, the color layer is uniform, the high dye-uptake can be realized under the low-salt condition, the conductivity of waste liquid is remarkably reduced, and the dye is suitable for dyeing protein fibers such as wool, nylon and silk.

The invention provides a phosphorus-fixing lanthanum-based nano composite material as well as a preparation method and application thereof, and relates to the field of novel nano composite materials. According to the material, lysozyme protein fibers are taken as a structural template, a confinement space is constructed by utilizing the ultrahigh length-diameter ratio of the lysozyme protein fibers, and controllable synthesis of the sub-5nm high-dispersion lanthanum oxide nanoparticles is realized. Functional groups in a protein chain can be enriched and nucleation sites can be provided through electrostatic attraction and key coordination synergistic effect, so that the lanthanum-based protein fiber nano composite material is formed. When the material is used for treating phosphorus wastewater, efficient phosphorus removal and long-term phosphorus fixation are realized through an enrichment-conversion synergistic mechanism: phosphate ions are enriched through electrostatic adsorption, and thermodynamically stable lanthanum phosphate is generated in situ at lanthanum active sites. According to the method, gt is still kept in the presence of high-concentration equal competitive ions; the phosphorus removal rate is 90%, the generated lanthanum phosphate can be used as a slow-release phosphate fertilizer or an industrial phosphorus chemical raw material, and closed-loop conversion from pollution purification to resource utilization is realized.

The invention discloses a porous protein heat-insulating fiber with a core-shell structure as well as a preparation method and application of the porous protein heat-insulating fiber. A protein solution is converted into a core layer structure and a shell layer structure with gradient pores through a coaxial spinning method by utilizing the phase separation difference of the protein solution caused by using a urea aqueous solution and trifluoroethanol as solvents, the shell layer is mainly composed of finger-shaped macropores, the core layer is of a uniform small-pore structure, and the shell layer and the core layer are tightly combined through a compact connecting layer. By regulating and controlling the spinning solution concentration, the coagulating bath exchange rate and the needle size, accurate construction of a hierarchical pore structure in the fiber is achieved, and the process is similar to a core-shell heat insulation mechanism of polar bear hair in the nature. The porous protein fiber with the core-shell structure shows excellent heat insulation performance and mechanical strength, has biodegradability and washing resistance, and is suitable for the high-efficiency heat insulation fields of intelligent clothing, building energy conservation, aerospace and the like.

The invention provides a soybean fermentation bacillus and application thereof, the strain number is ASD02, the strain is preserved in China General Microbiological Culture Collection Center on May 15, 2019, called CGMCC for short, and the address is No.3, Courtyard 1, Beichen West Road, Chaoyang District, Beijing; the postal code is 100101, and the preservation number is CGMCC No.17806; the Lactobacillus plantarum strain has a Latin literature name of Lactobacillus plantarum, and the Lactobacillus plantarum strain is Lactobacillus plantarum. Propagation of the strain ASD02 is carried out by using protein and fiber in bean sewage, and the produced acidic lipase can directly decompose grease in the bean sewage into fatty acid under a controlled condition, so that harmless treatment of the bean sewage is realized; and the obtained enzymatic hydrolysate can be directly used as an anaerobic biogas fermentation raw material, so that the continuous degree of bean sewage treatment is improved, and the resource utilization rate of bean sewage is further improved.

The invention relates to a preparation method of a fiber-based curry sauce capable of resisting reheating nutrition loss and the curry sauce. Comprising the following steps: 1) juice absorption: long protein fibers absorb turmeric juice to obtain a fiber material A; 2) rubber powder film coating: uniformly mixing the fiber material A with vegetable rubber powder, and shearing to obtain a fiber material B; 3) oil-emulsion blocking: uniformly mixing an emulsifier and vegetable oil, and uniformly mixing the obtained oil-emulsion material C with the fiber material B to obtain a protein fiber base material; and 4) stir-frying and curing: weighing vegetable oil, heating, adding a flavoring agent, mixing with the vegetable oil, stir-frying, adding a mixture of wheat flour, mashed potato and water, uniformly mixing to obtain a seasoning sauce, adding the protein fiber base material, uniformly mixing, curing, packaging, and sterilizing to obtain the curry sauce. Through the processes of juice absorption, rubber powder film covering, oil emulsion blocking and stir-frying and curing, the curry sauce is repeatedly heated for multiple times, so that the loss of curcumin can be reduced, and the curry sauce can be easily adhered to the surface of food to obtain better taste and flavor.

The application discloses an exosome sustained-release preparation and application thereof in treatment of tendon injury, and the sustained-release preparation takes a silk fibroin frozen sponge as a carrier, and the carrier is loaded with exosomes. The application provides the silk fibroin frozen sponge as the carrier of the exosomes, and the silk fibroin frozen sponge has good biocompatibility and biodegradability; the sustained release of the exosomes is realized by controlling a protein fiber network structure of the silk fibroin. The application utilizes the silk fibroin frozen sponge to release the exosomes in situ at a tendon injury site, so that a better tendon repair effect is achieved.

The application relates to a preparation method of high-adsorption-performance quinoa polypeptide aerogel. Firstly, WALTZ algorithm is used to predict and identify the easy-fibrillated quinoa polypeptide amino acid sequence of a quinoa protein fiber solution, the easy-fibrillated quinoa polypeptide amino acid sequence is obtained, and corresponding quinoa polypeptide is synthesized by adopting an Fmoc solid-phase synthesis method based on the quinoa polypeptide amino acid sequence; then the synthesized quinoa polypeptide is dissolved in water to form a quinoa polypeptide fiber solution; finally, the quinoa polypeptide fiber solution is mixed with a sodium alginate solution to prepare quinoa polypeptide aerogel. The WALTZ algorithm is used to predict the potential amino acid sequence of the quinoa protein which is easy to form a protein fiber, the Fmoc solid-phase synthesis method is used to synthesize quinoa decapeptide, and the high fibrillating capacity of the quinoa decapeptide is fully verified, so that efficient preparation of quinoa decapeptide amyloid fibers under neutral conditions is realized, and the quinoa decapeptide-sodium alginate composite aerogel with high adsorption performance for microplastics in water is prepared.

The invention discloses a chitosan / lysozyme amyloid protein fiber composite microneedle based on ethephon controlled release and application of the composite microneedle in on-demand ripening acceleration of harvested fruits, and belongs to the technical field of agricultural product after-harvest treatment. The composite microneedle is composed of chitosan, lysozyme amyloid protein fibers and ethephon, the mass ratio of the chitosan to the lysozyme amyloid protein fibers is 5: 5, and the ethephon loading capacity is that 131.13 [mu] L of a 40% ethephon solution is added to every 17.5 mL of a 1% chitosan solution. The microneedle can be inserted into the epidermis of picked fruits to realize on-demand slow release of ethephon and promote ripening of the fruits, meanwhile, the lysozyme amyloid protein fiber provides an antibacterial effect, the aging process of the fruits after ripening is effectively delayed, the infection rate of colletotrichum gloeosporioides is reduced, and the ethephon residue in the fruits is remarkably lower than the national limited standard. The method solves the problems of non-uniform fruit ripening, excessive softening and potential toxicity caused by a traditional ethephon ripening method, and realizes integration of batch on-demand ripening and preservation of picked fruits.

The present invention relates to novel adenovirus capsid protein-based delivery vehicles. These are based on modified penton-based protomers that are assembled into VLPs. The exposed regions of the penton-based proteins can be modified to allow the VLP to specifically bind to any target and / or to include any desired peptide epitope. Additional cargo, e.g. drugs, proteins or nucleic acids, can be reversibly or irreversibly attached to the VLP via engineered protein fiber fragments.The present invention relates to such engineered penton-based protomers, engineered proteins comprising an adenovirus fiber N-terminal protein fragment that specifically binds to an adenovirus fiber protein binding cleft of a penton-based protomer, VLPs comprising the engineered penton-based protomers and optionally engineered proteins comprising an adenovirus fiber N-terminal protein fragment that specifically binds to an adenovirus fiber protein binding cleft of a penton-based protomer, nucleic acid encoding the engineered proteins, the VLPs as well as methods of producing the proteins and the VLPs.

To provide a method of recovering a polyester component from a fiber product containing polyester fibers and protein fibers, and a method of manufacturing a recycled polyester with reduced discoloration using the recycled polyester.SOLUTION: Provided is a recovery method of treating a fiber product containing polyester fibers and protein fibers in an aqueous solution containing a reducing agent at a temperature of 50 to 100°C, and thereafter recovering a polyester component. It is further preferable that the polyester fiber is made of a polyester having an alkylene benzene dicarboxylate as a main repeating unit, the polyester fiber has been dyed, and the protein fiber is an animal fiber. In addition, a method of manufacturing the recycled polyester that re-polymerize the polyester component obtained by the recovery method is included.SELECTED DRAWING: None

The invention relates to the technical field of food preservation, in particular to hydrogel containing an electric field response antibacterial material as well as a preparation method and application of the hydrogel. The hydrogel is prepared from the following raw materials in parts by weight: 0.1 to 0.2 part of an electric field response antibacterial material; 2-5 parts by weight of polyvinyl alcohol; 0.5-3 parts by weight of amyloid protein fiber; 30-40 parts by weight of glycerin; and 0.3-0.5 part by weight of sodium chloride. The electric field response antibacterial hydrogel prepared by the invention has the capability of generating active oxygen such as superoxide anions, singlet oxygen and hydroxyl radicals, and has a good in-vitro antibacterial effect on aquatic product putrefying bacteria (shewanella putrefaciens).

The invention discloses a preparation method of regenerated protein lyocell fibers based on ionic liquid dissolution and recovery of plush and fibroin, which comprises the following operation steps: S1, waste plush or silk fibers are subjected to crushing, washing and bleaching treatment, and are dissolved in a dissolution kettle by using a two-component composite ionic liquid solvent to obtain a regenerated protein ionic solution; s2, filtering the protein ion solution, adding pre-crushed wood pulp and a thermoplastic polyurethane elastomer (TPU), and blending and stirring to form a uniform spinning solution; s3, extruding the spinning solution through a round spinneret plate, and entering a coagulating bath to obtain regenerated protein fibers; s4, the regenerated protein fiber is subjected to secondary washing, drafting, oiling, drying and cutting off, and the regenerated protein lyocell fiber is obtained. Brominated N-methylmorpholine N-oxide and 1-ethyl-3-methylimidazolium bromide are compounded to form a double-component composite solvent, and the double-component composite solvent is applied to dissolving of waste plush or silk fibers and preparation of regenerated protein lyocell fibers with high protein content.

The application discloses a preparation method of a collagen membrane material which can exist stably in a body for a long time. A dense and transparent collagen membrane with a transparence of more than 95% is formed by using an electric field to control assembly of collagen fibers, the fiber structure is once physically cross-linked and solidified, and further chemical strengthening cross-linking is carried out, the cross-linking strength is improved through different reaction sites, and then the shielding of the in-vivo enzymatic cutting site is carried out. The advantage is that the collagen assembly fiber diameter can be controlled to be 30-50nm by applying high electric field energy, the collagen assembly fiber is densely and orderly arranged, the collagen assembly fiber arrangement is bionic to natural tissue collagen protein fiber arrangement, has high bionics, and can exist stably in a body for a long time.

The invention discloses a low-temperature preparation method of a biomimetic mineralized dental material, which comprises the following steps of: (1) adding a microorganism sporosarcina pasteurii capable of generating calcium carbonate into a microorganism fermentation liquid capable of generating protein fibers for co-culture to obtain a fibrous biofilm containing the sporosarcina pasteurii; (2) adding the biological membrane into a mineralizing solution for biological mineralization; and (3) after mineralization is finished, performing high-temperature sterilization and drying on the material to obtain the biomimetic mineralized dental material. By adopting an in-situ mineralization technology and combining microbial co-culture with a biomineralization assembly technology, the preparation of the super-hard and super-tough bionic ceramic dental material can be realized under the near room temperature condition of 30 DEG C, and the super-high energy consumption of a traditional high-temperature sintering technology is avoided; the Vickers hardness HV value of the dental material prepared by the method is about 300 and is close to that of natural enamel, and the tensile toughness value of the dental material is 18 MJ / m < 3 > and is 10 times of that of natural teeth.

The invention relates to the field of textiles, and particularly discloses a negative ion milk fiber fabric and a preparation process. The anion milk fiber fabric is formed by blending anion milk fibers and cotton fibers, wherein the blending ratio of the anion milk fibers to the cotton fibers is (7-7.5): (2.5-3); the anion milk fiber yarns are regenerated protein fibers loaded with nano-scale tourmaline, and the mass ratio of the nano-scale tourmaline in the fiber matrix is 5-15%; the preparation method comprises the following steps: uniformly dispersing the surface-modified nano tourmaline in a milk protein spinning solution, carrying out wet spinning to obtain the negative ion milk fibers, blending the negative ion milk fibers with the cotton fibers to form the fabric, and carrying out plasma treatment. The anion milk fiber fabric has the advantages that the inherent skin-friendly comfort of the milk fibers is kept, and meanwhile, the anion function is permanently and efficiently released.

The invention relates to the technical field of fabrics, in particular to a PEF fiber knitted fabric and a low-temperature dyeing process, PEF fibers serve as a core layer, the core layer is coated with bio-based protein fibers to form a skin-core structure, and the surface of the fabric is of a microporous structure; the proportion of the PEF fibers in the skin-core structure is 60%-80%, and the proportion of the bio-based protein fibers in the skin-core structure is 20%-40%; the intrinsic viscosity of the PEF fiber is 0.8 to 1.0 dL / g; the pore diameter of the microporous structure is 1-5 microns, the porosity is larger than or equal to 15%, the microporous structure is prepared through a supercritical CO2 foaming process, the foaming pressure is 15-25 MPa, and the temperature is 60-70 DEG C; through cooperation of a skin-core structure, fiber modification, supercritical CO2 foaming and a low-temperature dyeing process, a microcosmic interface, a structural form and process control are comprehensively optimized, so that the PEF fiber knitted fabric has environmental friendliness, high air permeability, high mechanical strength and excellent dyeing performance at the same time, the technical problems of an existing PEF fabric are effectively solved, and the PEF fiber knitted fabric is worthy of popularization and application. The market demand of the current green clothing fabric is met.

The invention relates to the technical field of ink-jet printing, and discloses compound high-fixation-rate reactive dye ink and a preparation method thereof. According to the invention, in a compound ink system, the cationic compound forms an association compound with the anionic reactive dye due to the characteristic of positive charges, so that the electrostatic repulsion effect between the association compound of the cationic compound and the anionic reactive dye and fibers (cellulose fibers, protein fibers and the like) with negative charges is shielded; diffusion and fixation of reactive dye associates in the fibers are assisted, so that the fixation rate of reactive dye ink is improved, and the content of hydrolyzed dyes in wastewater is reduced. Meanwhile, by utilizing the solubilizing and stabilizing effects of micelles formed by the stabilizer on the cationic compound and the anionic reactive dye association compound, the stability of the compound high-fixation-rate reactive dye ink is improved, and the research has a very good popularization value.

This invention discloses a skin-care breathable environmentally friendly fiber yarn and its preparation process. The fiber yarn comprises several groups of first yarns and several groups of second yarns, which are intertwined and twisted together. The first yarn, from the inside out, includes a first inner yarn layer, a breathable layer, and an antibacterial fiber layer. The second yarn, from the inside out, includes a second inner yarn layer, an antioxidant layer, and a skin-care layer. This invention provides a skin-care breathable environmentally friendly fiber yarn and its preparation process. The fiber yarn, woven using a breathable layer and the upper end of regenerated fibers, possesses good breathability. The inclusion of protein fibers and hemp fibers provides UV protection, resulting in a significant skin-care effect. The inclusion of first antibacterial fibers, deodorizing fibers, and second antibacterial fibers provides antibacterial properties and prevents musty odors from developing during long-term storage, thereby improving the quality of the fiber yarn.

The invention discloses a protein fiber dyeing method, a protein fiber and a fabric, according to the protein fiber dyeing method, reducing sugar DHA is reacted with indigo blue, and low-temperature green dyeing and functional modification of the protein fiber are synchronously realized by utilizing the dual functions of a reducing agent and a color developing agent of DHA. Specifically, ketose-dihydroxy acetone (DHA) is used for reducing indigo into a leuco body, meanwhile, the ketose-dihydroxy acetone (DHA) and amino in protein fibers are subjected to a Maillard reaction to generate yellowish-brown pigment, and a unique yellow-green system is formed by combining a blue system of traditional indigo, so that the dyeing chromatography is widened, meanwhile, the dyeing process is green and environmentally friendly, and the dyeing efficiency is improved. The dyed protein fiber is endowed with excellent anti-ultraviolet performance (UPFgt; 1800) and oxidation resistance (the free radical scavenging rate can reach 70%), and the strength of the dyed protein fiber is almost not lost after dyeing.

The invention relates to the technical field of textile fibers, and discloses an anti-wrinkle cellulose acetate fiber fabric and a preparation method thereof.The preparation method comprises the steps that in the raw material pretreatment stage, wood pulp is subjected to alkali impregnation, and silk protein fibers are subjected to plasma activation; in the spinning solution preparation stage, a cellulose acetate spinning solution A containing modified nano titanium dioxide and an anti-wrinkle auxiliary agent and a silk protein-grafting agent spinning solution B are prepared respectively; in the composite spinning stage, a spinning solution A and a spinning solution B are synchronously extruded through a skin-core structure spinneret plate, and drafting forming is conducted through a low-temperature acetic acid coagulating bath; steam setting and anti-wrinkle finishing liquid padding treatment are adopted in the after-finishing stage. The technical defect that a traditional acetic acid fabric is prone to generating permanent wrinkles is overcome, the lasting flatness maintaining capacity of the fabric is achieved, meanwhile, the defect of spinning broken ends caused by agglomeration of nano-particles is overcome, the industrial problem that in the prior art, the anti-wrinkle durability is insufficient is solved, and the service life of high-end clothes products is prolonged.

The present invention relates to the field of bacterial protein engineering and protein fibers applicable as metal-binding bionanomaterials. More specifically, the present invention relates to engineered bacterial endospore appendage (Ena) proteins modified to contain metal-binding polypeptide (MBP) inserts providing for stable, flexible and robust protein assemblies with metal-binding activity. In particular, the invention relates to methods for designing Ena-fusion proteins capable of self-assembling into fibers, and for recombinant production of said self-assembling Ena-MBP fusion protein subunits, assemblies and fibers, ensuring a sustainable source of biological material for use in metal mineralization, metal sequestration, and metal-removal applications such as waste water treatment, water softening, or bioremediation.